lib/net_utils.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Generic network code. Moved from net.c
   4  *
   5  * Copyright 1994 - 2000 Neil Russell.
   6  * Copyright 2000 Roland Borde
   7  * Copyright 2000 Paolo Scaffardi
   8  * Copyright 2000-2002 Wolfgang Denk, wd@denx.de
   9  * Copyright 2009 Dirk Behme, dirk.behme@googlemail.com
  10  */
  11
  12 #include <common.h>
  13
  14 struct in_addr string_to_ip(const char *s)
  15 {
  16         struct in_addr addr;
  17         char *e;
  18         int i;
  19
  20         addr.s_addr = 0;
  21         if (s == NULL)
  22                 return addr;
  23
  24         for (addr.s_addr = 0, i = 0; i < 4; ++i) {
  25                 ulong val = s ? simple_strtoul(s, &e, 10) : 0;
  26                 if (val > 255) {
  27                         addr.s_addr = 0;
  28                         return addr;
  29                 }
  30                 if (i != 3 && *e != '.') {
  31                         addr.s_addr = 0;
  32                         return addr;
  33                 }
  34                 addr.s_addr <<= 8;
  35                 addr.s_addr |= (val & 0xFF);
  36                 if (s) {
  37                         s = (*e) ? e+1 : e;
  38                 }
  39         }
  40
  41         addr.s_addr = htonl(addr.s_addr);
  42         return addr;
  43 }